The Mexican

Jerry Welbach (Pitt), a reluctant mob bagman, has promised his pressuring
girlfriend Samantha (Roberts) that he'll give up his criminal ways. But first he has
to do one last job: travel to Mexico to retrieve an antique pistol (The Mexican)
which is said to be cursed. The Mexican was forged by a blacksmith as part
of a 'gift package' for the man who is to marry his daughter.

To ensure the gun is returned safely, a hit man (Gandolfini) travels to Las Vegas and takes Samantha hostage.